CN100520354C - Alloy chemical property check using thin layer signet method - Google Patents
Alloy chemical property check using thin layer signet method Download PDFInfo
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- CN100520354C CN100520354C CNB200710051465XA CN200710051465A CN100520354C CN 100520354 C CN100520354 C CN 100520354C CN B200710051465X A CNB200710051465X A CN B200710051465XA CN 200710051465 A CN200710051465 A CN 200710051465A CN 100520354 C CN100520354 C CN 100520354C
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Abstract
The invention relates to a rapid test alloy corrosion resistance performance and chemical composition size method. The steps of the method are: covering the alloy surface with a water absorbing thin layer, dropping or spraying electrolyte solution on the thin layer, using conductive seal to cover the thin layer, and using alloy for the cathode, seal for anode, energized some time, then opening the thin layer, and by observing the true nature of the metal ion on the thin layer or the color of metal ions and indicator chelating, to judge the corrosion resistance performance of the alloy and the chemical composition size of the alloy.
Description
Technical field
But the present invention relates to the method for chemical composition content number between a kind of quick test alloy corrosion resistance and the comparison alloy.
Background technology
Along with the continuous development of national industry and the raising of smelting technique, alloy species a multitude of names, a lot of metallic luster are extremely close, and naked eyes are difficult to distinguish.And conventional detection means wastes time and energy and costs an arm and a leg, for example using spectrophotometric method to detect tenor need weigh metal, dissolve, adjust wavelength, time-consuming length and systematic error repeat accumulative total, and utilize Auger electron spectroscopy to detect, instrument is expensive and carry difficultly, can't satisfy conveniently demand of market.
The method of judging the corrosion resistance of metals energy mainly contains hanging slice method and method of polarization curve.The hanging slice method required time is extremely very long, and the time error of weighing is big.Method of polarization curve had relatively high expectations in the metal surface and the instrument costliness fragile.So a kind of method of simple and efficient judgement metal resistance to corrosion will satisfy the need in market.
Summary of the invention
The present invention provides a kind of conveniently detection method at the problems referred to above that exist in the existing measuring technology, and this method is extremely simple, and cost is very low, and is easy to operate.
The present invention's technical scheme that is adopted of dealing with problems is: the thin layer that can absorb water at the alloy surface layer overlay, on thin layer, drip or the sprinkling electrolyte solution, cover thin layer with conductive seal, with the alloy is anodal, seal is a negative pole, the energising regular hour, make metallic ion enrichment on thin layer, thereafter open thin layer, by the true qualities of metallic ion or the color behind metallic ion and the indicator chelating on the observation thin layer, the number of chemical analysis between the corrosion resistance of judgement alloy and the comparison alloy.
Corrosion resistance is relevant with the time that color occurs, and the number of chemical constitution is relevant with the color power between the alloy.
The suction thin layer can be made of 0.001-5 millimeters of thickness filter paper or transparent colloid.
Seal bottom can have the decorative pattern also can smooth no line, floorage: 0.01-50 square centimeters.
Energising voltage range: 0-99 volts.
Main indicator has:
1, beryllium indicator: chrome azurol S (0-20%) aqueous solution forms blue complex with chromium ion.
2, cadmium indicator: dithizone (0-20%) aqueous solution, and every forming red complex.
3, chromium indicator: by diphenylcarbazide (0-20%), sulfuric acid (0-50%), the aqueous solution that organic cosolvent (0-50%) is formed is purple with the sexavalent chrome complexing
4, copper indicator I: by bisoxalydihydrazone (0-20%), boric acid (0-30%), the aqueous solution that NaOH (0-30%) is formed is blue with the copper ion complexing.
5, copper indicator II: by bisoxalydihydrazone (0-20%), ammoniacal liquor (0-50%), the aqueous solution that acetaldehyde (0-5%) is formed is aubergine with the copper ion complexing.
6, copper indicator III:, be deep red blueness with the copper ion complexing by ammoniacal liquor (0-100%) solution composition.
7, zinc indicator: by dithizone (0-20%), the aqueous solution that sodium thiosulfate is formed takes on a red color with the zinc ion complexing.
8, nickel indicator: by dimethyl second two ketoximes (0-20%), ammoniacal liquor (0-50%), NaOH (0-50%), the aqueous solution that organic cosolvent (0-30%) is formed takes on a red color with the nickel ion chelating.
9, iron indicator I: by phenanthroline (0-20%), oxammonium hydrochloride (0-20%), the aqueous solution that ascorbic acid (0-20%) is formed takes on a red color with the ferric ion chelating.
10, iron indicator II: potassium rhodanide (0-20%) aqueous solution shows red with the ferric ion chelating.
11, iron indicator III: potassium ferrocyanide (0-20%) aqueous solution is blue with the ferric ion chelating.
12, magnesium indicator:, be aubergine with the magnesium ion chelating by eriochrome black T (0-20%) and the aqueous solution that EDTA (sodium ethylene diamine tetracetate) (0-30%) forms.
13, aluminium indicator: rhodo carboxylic acid ammonium (0-20%) aqueous solution takes on a red color with the aluminium ion chelating.
Percentage composition is all in the quality percentage composition.
Organic cosolvent only needs and can get final product by the accelerate dissolution indicator, and acetone, ethanol, methyl alcohol all can.
Electrolyte is made up of one or more of acid, alkali, salt, and adding of the percentage composition of its solute and solvent is combined into 100%.
The seal of thin layer seal method is by enriched in metals element on thin layer, and the method for indicator colour developing has overcome the deficiency of spectrophotometric method length consuming time, damage metal, has satisfied the needs on a part of market.
The time that metallic ion develops the color on thin layer is directly proportional with the erosion-resisting performance of alloy, can judge the power of same type alloy corrosion resistance in view of the above, and device is easy to carry about with one for a short time, and is very convenient.
Advantageous effect
1, by uniform electric field of seal bottom surface and alloy surface formation, make controlledization of process of enriched in metals ion in the thin layer, reappearance improves greatly.
2, thin layer seal method can be judged chemical analysis number in the alloy by the color behind metallic ion true qualities or metallic ion and the indicator chelating, and colour developing rapidly, and is convenient and swift.
3, thin layer seal method can be judged the power of alloy corrosion resistance by the time of metallic ion colour developing, need not special device.
4, be separated with thin layer between seal and the alloy, avoided the possibility of electric pole short circuit, safe and reliable.
Realize concrete mode of the present invention
Embodiment 1: copper-nickel alloy, and carbon steel, stainless steel, four kinds of alloys of magnalium all are silvery white in color, and naked eyes are difficult to distinguish.Spread thin layer filter paper on these three kinds of alloys, the ammonium sulfate electrolyte of Dropwise 5 % covers seal, with 9 volts voltage energisings 20 seconds, opens filter paper, drips copper indicator I on filter paper, has only copper-nickel alloy to show blue; On filter paper, drip copper indicator II, have only copper-nickel alloy to show red; On filter paper, drip copper indicator III, have only copper-nickel alloy to show deep red blueness; On filter paper, drip the magnesium indicator, have only the magnalium displaing amaranth; On filter paper, drip the chromium indicator, have only stainless steel to show purple; On remaining a kind of alloy filter paper, drip iron indicator I and show red; Drip iron indicator II and show red; Drip iron indicator III, show blue.Differentiation is got up, and is very convenient quick.
Embodiment 2: siderochrome Magno: 1Cr17Mn6Ni5N and 1Cr18Mn8Ni5N contain manganese, and relying on naked eyes can't distinguish any alloy, to contain manganese more, and it is less that any alloy contains manganese.On these two kinds of alloys, spread thin layer filter paper, the ammonium sulfate electrolyte of Dropwise 5 %, seal is covered, with 9 volts voltage energisings 5 seconds, open filter paper, on the filter paper redness of 1Cr18Mn8Ni5N obviously to firmly get than 1Cr17Mn6Ni5N many, this be because 9 volts the electric potential difference between MnO4 and the electrode head and shoulders above under the voltage, manganese on the alloy is converted into MnO4 rapidly, thereby shows the true qualities-aubergine of MnO4.The method can be distinguished the number that adds element in the alloy.
Embodiment 3: fe-cr-ni alloy: 0Cr23Ni13 and 1Cr17Ni7 contain nickel, and it is many to rely on naked eyes can't distinguish the nickel that any alloy contains, and the nickel that any alloy contains is few.Spread thin layer filter paper on these two kinds of alloys, the ammonium sulfate electrolyte of Dropwise 5 % covers seal, with 9 volts voltage energisings 5 seconds, opens filter paper, drips the nickel indicator, and the redness of 0Cr23Ni13 obviously is better than 1Cr17Ni7.This means as long as the standard alloy of a known nickel content is arranged on hand, just can judge whether nickel content in other the alloy is higher than the nickel content in this standard alloy.
Embodiment 4: cast iron (iron-carbon alloy), the ferrochrome 3Cr13 that the eighties is smelted with the ferrochrome 1Cr17 that smelting in 2006 is come out, relies on naked eyes can't judge which kind of alloy corrosion resistance is stronger.Spread thin layer filter paper on these two kinds of alloys, the ammonium sulfate electrolyte of Dropwise 5 % covers seal, and with 9 volts voltage energising, the filter paper of ferrochrome 3Cr13 promptly shows glassy yellow 5 seconds, and the filter paper of ferrochrome 1Cr17 wants 30 seconds ability to show glassy yellow.Illustrate that 1Cr17 is stronger than the corrosion resistance of 3Cr13.And a cast iron whitening green, this is the performance that ferrous ion is sharply assembled on filter paper, illustrates that this alloy very easily corrodes.
Though showed preferred embodiments more of the present invention above, will be appreciated that under the situation that does not depart from the appended claims scope and can make various variations and remodeling to the present invention.
Claims (15)
- But 1, the method for a kind of quick test alloy corrosion resistance and chemical composition content number, the step of this method has: the thin layer that can absorb water at the alloy surface layer overlay, on thin layer, drip or the sprinkling electrolyte solution, cover thin layer with conductive seal, with the alloy is anodal, seal is a negative pole, the making alive regular hour, open thin layer, by the true qualities of metallic ion or the color behind metallic ion and the indicator chelating on the observation thin layer, the number of chemical analysis between the corrosion resistance of judgement alloy and comparison alloy.
- 2, the method for claim 1 is characterized in that: conduction seal bottom can have the decorative pattern also can smooth no line, only needs the plane and the alloy surface almost parallel of seal bottom.
- 3, the method for claim 1 is characterized in that: electrolyte solution is made up of acid, alkali, salt or their potpourri, only needs the electrolysis mass-energy conduction that drips.
- 4, the method for claim 1 is characterized in that: the suction thin layer can be made up of filter paper or transparent colloid, only needs the plane and the alloy surface almost parallel of seal bottom.
- 5, the method for claim 1 is characterized in that: indicator can drip colour developing on thin layer after the energising, also can add directly energising colour developing among the electrolyte, only needs the plane and the alloy surface almost parallel of seal bottom.
- 6, the method for claim 1 is characterized in that: when showing beryllium ion in the method the used beryllium ion indicator of thin layer colour developing can be the aqueous solution of chrome azurol S, be blue with the chromium ion complexing.
- 7, the method for claim 1 is characterized in that: when showing cadmium ion in the method the used cadmium ion indicator of thin layer colour developing can be the aqueous solution of dithizone, take on a red color with the cadmium ion complexing.
- 8, the method for claim 1 is characterized in that: when showing chromium ion in the method the used hexavalent chromium indicator of thin layer colour developing can be: the aqueous solution by diphenylcarbazide, sulfuric acid, organic cosolvent are formed is purple with the sexavalent chrome complexing.
- 9, the method for claim 1 is characterized in that: when showing copper ion in the method the used copper ion indicator of thin layer colour developing can be: the aqueous solution by bisoxalydihydrazone, boric acid, NaOH are formed is blueness with the copper ion complexing.
- 10, the method for claim 1 is characterized in that: when showing copper ion in the method the used copper ion indicator of thin layer colour developing can be: the aqueous solution by bisoxalydihydrazone, ammoniacal liquor, acetaldehyde are formed is characterized in that: be aubergine with the copper ion complexing.
- 11, the method for claim 1 is characterized in that: when showing copper ion in the method the used copper ion indicator of thin layer colour developing can be ammonia spirit, be deep red blueness with the copper ion complexing.
- 12, the method for claim 1 is characterized in that: when showing zinc ion in the method the used zinc ion indicator of thin layer colour developing can be: the aqueous solution by dithizone, sodium thiosulfate are formed takes on a red color with the zinc ion complexing.
- 13, the method for claim 1, it is characterized in that: when showing nickel ion in the method the used nickel ion indicator of thin layer colour developing can be: by dimethyl second two ketoximes, ammoniacal liquor, NaOH, the aqueous solution that organic cosolvent is formed takes on a red color with red nickel ion chelating.
- 14, the method for claim 1 is characterized in that: when showing magnesium ion in the method the used magnesium ion indicator of thin layer colour developing can be: the aqueous solution by eriochrome black T and sodium ethylene diamine tetracetate are formed is aubergine with the magnesium ion chelating.
- 15, the method for claim 1 is characterized in that: when showing aluminium ion in the method the used aluminium ion indicator of thin layer colour developing can be rhodo carboxylic acid ammonium aqueous solution, take on a red color with the aluminium ion chelating.
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| CNB200710051465XA CN100520354C (en) | 2007-02-02 | 2007-02-02 | Alloy chemical property check using thin layer signet method |
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| CNB200710051465XA CN100520354C (en) | 2007-02-02 | 2007-02-02 | Alloy chemical property check using thin layer signet method |
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| CN100520354C true CN100520354C (en) | 2009-07-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798633A (en) * | 2012-08-14 | 2012-11-28 | 山西太钢不锈钢股份有限公司 | Rapid detection method for copper content in stainless steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103018233B (en) * | 2011-09-28 | 2016-03-23 | 中国科学院大连化学物理研究所 | A kind of chlorine bromine iodide ion semi-quantitative detection method adopting indicator displacement reaction |
| CN102798604A (en) * | 2012-08-27 | 2012-11-28 | 苏州金宏气体股份有限公司 | Method for detecting content of iron in high pure and ultra pure ammonia |
| CN108905616B (en) * | 2018-09-06 | 2024-05-31 | 泉州师范学院 | Photoelectrocatalysis synergistic air purification device and application method thereof |
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Non-Patent Citations (2)
| Title |
|---|
| 0.1mol/LNaCl溶液中不同剥蚀程度LY12CZ合金的EIS特征. 张正等.金属学报，第40卷第7期. 2004 |
| 0.1mol/LNaCl溶液中不同剥蚀程度LY12CZ合金的EIS特征. 张正等.金属学报，第40卷第7期. 2004 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798633A (en) * | 2012-08-14 | 2012-11-28 | 山西太钢不锈钢股份有限公司 | Rapid detection method for copper content in stainless steel |
| CN102798633B (en) * | 2012-08-14 | 2015-02-25 | 山西太钢不锈钢股份有限公司 | Rapid detection method for copper content in stainless steel |
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